2009/4/8 Jody Garnett <[email protected]>
> Morning Kedar: Thanks for joining us on the user list (perhaps you can
> remove your comments added to the ImageLab page? Or I can when we sort
> out the example again.
>
> Since the ImageLab example was written GeoTools now has the ability to
> make use of a raster symbolizer; I suspect that this new found skill
> is what is tripping us up (I suspect we need to do a better job of
> setting up our style prior to drawing).
>
> Perhaps the style refers to "Band 3" expecting and RGB image? If it is
> not around (say we are using a color indexed image) we would get an
> error such as you describe.
Yes i guess that was precisely the problem....
and now after the updated code for the ImageLab it is working perfectly
fine!...Cheers! :-)
thanxx a lot!!! :-)
>
> Jody
>
> On Wed, Apr 8, 2009 at 12:15 AM, kedar marathe <[email protected]>
> wrote:
> > The ImageLab.java file in the "User Guide" for Geotools, if compiled "as
> it
> > is", gives the error ...."variable 'style' not found" at the line:
> >
> > renderer.paint( g, coverage, style );
> >
> > ....we removed this error by feeding this code before "renderer.paint( g,
> > coverage, style ); " :-
> >
> >
>
> //---------------------------------------------------------------------------------------------
> >
> > StyleFactory factory =
> > CommonFactoryFinder.getStyleFactory(null);
> > StyleBuilder sb = new StyleBuilder(factory);
> >
> >
> > ColorMap cm = sb.createColorMap(
> >
> > new String[]{"0", "255"},
> >
> > new double[]{0, 255},
> >
> > new Color[]{ new Color(0, 0, 0),new Color(255, 255, 255)}
> >
> > ,ColorMap.TYPE_RAMP);
> >
> > RasterSymbolizer sym = sb.createRasterSymbolizer(cm, 1.0);
> > Style style = sb.createStyle(sym);
> >
>
> //---------------------------------------------------------------------------------------------
> >
> > But then we got the error :
> >
> > "The method paint(Graphics2D, GridCoverage2D, RasterSymbolizer) in the
> type
> > GridCoverageRenderer is not applicable for the arguments (Graphics2D,
> > GridCoverage2D, Style)"
> >
> > So then we added "sym" as a parameter to paint method instead of "style":
> >
> > //----------------------------------------------------------------------
> >
> > renderer.paint( g, coverage, sym /*style*/);
> >
> > //----------------------------------------------------------------------
> >
> > and now it builds and compiles alright, but instead of displaying the
> world
> > image it gives the following error in the display pane:
> >
> > "Band number 3 is not valid"
> >
> > ....any suggestions? please help!
> >
> > -Kedar
> >
> >
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